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i just upgraded my UMO with silent steppers and initially it was great. then i noticed that one axis was missing steps. as much as i tried to dial in the steppers by adjusting the current by fixing the Vref (0.8 - 1.2V) i could not find a setting the worked for longer prints. also played with the cooling fans as the steppers get quite hot regardless of the passive cooling. the only way to get a longer print (>2 hours) without missing steps was by adjusting max acceleration Amaxx and Amaxy with the ulticontroller.

here is my question: am i the only one who has missing steps or do most of you reduce the acceleration or any other tweak?

if someone of you has any advice on such settings or another idea what could be wrong with my silent steppers please let me know. i changed vmaxx and y from 9000 to around 1500-2000 so quite a bit and it obviously slowed down the overall print speed but no more skipping of the steps.